Log barking apparatus



June 22, 1954 Q E -H E 2,681,670

LOG BARKING APPARATUS Filed May 21, 1951 4 Sheets-Sheet l INVENTOR.Charles E. Pren hoe AH'y.

June 22, 1954 c. E. PRENTICE 2,681,670

LOG BARKING APPARATUS Filed May 21, 1951 4 Sheets-Sheet 2 INVEN TOR.

C12 arls E. Pren 7'1'ce June 1954 c. E. PRENTICE LOG BARKING APPARATUS 4Sheets-Sheet 3 Filed May 21, 1951 INVENTOR. Charles E .Pren Hoe $24 021June 1954 c. E. PRENTICE LOG BARKING APPARATUS 4 Sheets-Sheet 4 FiledMay 21 1951 INVENTOR. Charles E. Pren zlce Patented June 22, 1954 UNITEDSTATES PATENT OFFICE- Charles E. Prentice, Portland, Oreg. ApplicationMay 21, 1951, Serial No. 227,297

This invention relates to improvements in log barking apparatus of thetype shown and described in United States Patent No. 2,259,584 datedOctober 21, 1941. As therein pointed out the invention relatesparticularly to log barking machines of the type described wherein apower driven rotary tool is employed to remove the bark from successiveareas presented by rotation of the log in combination with longitudinalmovement thereof in progressive process.

It is one of the principal objects of the present invention to provideapparatus of this character which is of simple, efiicient, durable,compact construction and accurately adjustable to logs of all diametersand also wherein the cutting tool is adjustable in lateral inclinationin conformity with the taper of a log in the direction of its length.

The foregoing and other objects will appear as my invention is morefully hereinafter described in the following specification,illustratedin the accompanying drawing and finally pointed out in the appendedclaim.

In the drawings:

Figure 1 is a side elevation of the invention shown operatively engagedwith a rotatable log.

This view is partly in section and is taken approximately along the linel-l of Figure 2.

Figure 2 is a fragmentary top plan view of Figure 1 taken approximatelyalong the line 2-2 of Figure 1.

Figure 3 is a sectional end elevation taken approximately along the line3-3 of Figure 1.

ures 1, 2 and 3 reference numeral I indicates generally a base made upof spaced-apart parallel members in the form of angle irons 2 and 3 orchannelsections if so desired. These base members aresecured inspaced-relation to each other and mounted upon a support indicated at 4which may be either in the form of a float anchored in a mill pond or aplatform extending out into the pond and against the outside surface ofwhich a log 5 may be drawn, the log being rotated with respect to theplatform by any approved means, such, for example, as the chains shownand described in the above identified 1 Claim. (Cl. 144-208) UnitedStates patent, or by the mechanical means forming part of this presentinvention as hereinafter pointed out. The front of the support is formedwith an inwardly extending recess having vertical side walls 4A and aback wall 4B to permit the apparatus to operate below as well as abovethe top surface of the float.

The approximate water level in relation to the support 4 and the log 5is indicated at 6. A movable cross member 6A is arranged transverselybetween the base members 2 and 3 and secured as at l to the cross-memberis a pair of aligned bearings 8 through which is rotatably mounted ashaft 9. Secured as at It] to the shaft 9 and rockable therewith is aplatform II and tothis platform is secured a pair of aligned bearings I2and 13 arranged at right-angles to the shaft 9. Within the bearings l2and 13 is rotatably mounted a shaft M to which is secured one end of aswingable carriage generally indicated at l5 by means of spaced-apartend plates l6 and I1 secured as at "A to the shaft. The carriage is madeup of spaced apart I beams whose inner ends are welded to the plate It.It is to be noted (see Fig. 1) that the plates l6 and I I are spacedapart from the platform H and free to move with respect thereto. By thisarrangement the carriage 15 may be swung upwardly and downwardly in avertical plane about the shaft 9 and tilted transversely to either sideabout the shaft 14.

Secured as at [8 across the end plates l5 and ll of the carriage 15 bymeans of a base ISA and movable therewith in both directions asaforesaid is an electric motor l9 provided with a driving pulleyembraced by a belt or belts 2| also embracing a driven pulley 22 securedto a shaft 23 rotatably mounted by means of bearings 23A to the oppositeor outer end of the carriage l5. Secured to the shaft 23 and rotatabletherewith is any approved type of rotary cutterhead 23B covered by ahood 24 and adapted for cutting engagement with the bark of logs of anydiameter by reason of the swingable adjustment of the carriage in avertical plane as aforesaid.

For minutely adjusting the cutterhead with respect to the periphery ofthe log for regulating the depth of cut of the cutterhead I pivotallyattach as at 25 to the underside of both beams of the carriage 15, theinner ends of a pair of shoes 26 and 21 whose opposite or outer ends arepivotally connected as at 28 to alternately operable piston rods 29mounted by means of their pistons within operating cylinders 30 and 3|each of which is in open communication with 45 and 46 at each of theirends.

pressure and exhaust lines 32 and 32 controllable by any approved typeof operating mechanism, not shown.

The rocking of the carriage to either side is accomplished by adouble-acting pressure cylinder 33 (see Fig. 3) having a piston thereinconnected by means of its piston rod 34 as at 35 to the platform I l'upon which the bearings i2--i3 and shaft M are mounted. The top end ofthe cylinderis connected as at 35A to the motor base 18A secured acrossthe end plates l6 and ll of the carriage.

The swinging of the frame upwardly and down wardly in a vertical planeas aforesaid is accomplished by a cylinder 36 in open communication withalternate pressure and exhaust lines 31-38 and provided on its'interiorwith a piston connected by means of its rod 39 to an arm 49 extendingrearwardly from the end of the plat- Mounted to the inner ends-of thebase mem here :2 and 3 by welding, bolting, or the like, are

two angularly disposed frames generally indicated at 22 each made up ofa pair of vertically spaced-apart angle irons 43 and 4 5 secured inspaced relation to each other by hearing blocks Rotatably mounted withineach pair of bearing blocks in each frame is a screw shaft 4?, each ofwhich is provided at one of its ends with a driven sprocket wheel 48embraced by a sprocket chain ,49 embracing and driven by a drivingsprocket -50 connected by means of a. shaft 5i through .anyapproved typeof gear reduction or power transmission means 52 operatively engagedwith and'drivenby a motor 53, The motor and transmission are mountedupon any approvedtype of support fid secured to the outer endof theframes 42 and extending upwardly therefrom.

Secured to each end of the crossmember 6A 1' is. an upright member 55and the upper end of each upright member is provided with a squaredprojection 56 bored and internally threaded for operative engagementwith the screw shafts 41 for movement therealong in either direction in.the manner of a traveler nut, when the shafts are rotated. By thisarrangement and uponoperation of the motor 53 the carriage anditsrelated parts may be advanced forwardlyand upwardly with respect tothe base i to accommo- 58 of the frame is provided with shoes 59slidable along parallel tracks 69v by means of a worm or screw shaft Bldriven by a motor and power transmission means as at 62 and extendingthrough a threaded block 63 secured to the bottom .of the base 58. Inthis form of the invention the log 5A instead of floating in wateradjacent a float is rotatably mounted upon and supported by alignedpairs of worm gears 64 secured to shafts 65 rotatably mounted in theupper ends of standards 65 Whose bases 61 are slidably mounted onparallel tracks 68. The standards and their worm gears 64 in each pairare adjustable toward and away from each other along their respectivetrack by means of an adjusting screw shaft 69 provided with a worm gear"i0 driven by a screw shaft H which in turn is driven by any approvedmotor and power transmission means generally indicated at 12. One

' shaft 13 of the power transmission means is enaged-with a worm gear 14secured to a shaft 15 which is provided with worms 16 and 11 operativelyengaged with the worm gears 64 and adapted to actuate the same forrolling the log while at the same time the barking apparatus is beingmoved along the tracks 69.

In the further modification illustrated in Figure 5 the carriage-and itsrelated partsand'opcrating mechanisms are the same as those shown anddescribed in the other forms of the inven-- tion but the cross member ismounted upon a base 18 movable along tracks 19 by means of a travelerblock 86 secured to the underside .of the base and engaged with a worm8i driven by motor and power transmission means generally indicated at82. in connection with this form of the invention is rotatably mountedbetween a pair of standards 83 in Whose upper ends are journaledinwardly extending shafts Bd pointed on their inner ends and driven intothe end of the log so that the log may rotate in the same manner as awork piece supported between lathe centers.

While I have shown a particular form of embodiment of my invention, I amaware that many minor changes, therein will readily suggest themselvesto others skilled in the art without departing from the spirit and scopeof the invenly attached at one of its ends to a second base for swingingmovement in a vertical plane and in lateral inclination with respect tosaid second base, a cutting tool rotatabiy mounted at the opposite endof said carriage and operatively connected with'a motor carried by saidsecond base, said second base being slideably mounted within said tracksfor movement in the direction of the length of said tracks forpresenting said cut-- ting tool to logs of various diameters. Y

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date v 1,294,275 Johnson et a1. Feb. 11, 1919 1,358,993 Shaw Nov.16, 1920 1,673,255 Pangborn June 12, 1928 2,259,584 Prentice Oct;2111941 2,576,967 Pauley Dec. 4, 1951 The log 53 being dealt with I i I

